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5339results about "Surface mining" patented technology

Artificial soil and method for land reclamation by aid of gold mine tailing slag backfill exploitation regions

The invention provides artificial soil and a method for land reclamation by the aid of gold mine tailing slag backfill exploitation regions. The method includes carrying out filling and compaction onthe tailing waste slag backfill exploitation regions; uniformly mixing various components of the optimally designed artificial soil with one another and ultimately covering tailing waste slag backfillsurfaces with the novel artificial soil with a certain thickness so as to effectively treat mine tailing. The artificial soil and the method have the advantages that the prepared artificial soil contains abundant nutrient components, the contents of organic matters can be increased, the gas permeability of the soil can be improved, and the artificial soil is excellent in water retention capacityand fertilizer preservation capability and suitable for growth of plants; organic thoroughly decomposed substances come from agricultural and forestry waste, are extensive in source and are easily available, accordingly, solid waste can be comprehensively utilized in a 'reduction, resource utilization and harmlessness' manner, and the artificial soil and the method conform to principles of circular economy; the land occupation problems of tailing ponds and the problems in the aspect of tasks of land reclamation of mined-out regions can be simultaneously solved by the aid of the artificial soiland the method, and the artificial soil and the method have large market spaces.
Owner:杰瑞(莱州)矿山治理有限公司

Sublevel shrinkage caving stage open stope afterwards filling mining method

The invention discloses a sublevel shrinkage caving stage open afterwards filling mining method. In the earlier stage of stoping, caved ores are utilized to support surrounding rocks on a top tray, and in the later stage of stoping, a goaf area is filled with fillers to control ground pressure so as to achieve safe and efficient mining. Ore blocks are mined in two steps, mining blocks in step two are stoped after the mining blocks in step one are stoped and filled. After the ores are completely let out, the goaf area is filled with the fillers to control the ground pressure. Because the stoping modes of sublevel ore caving, sublevel shrinkage, final ore drawing and empty area afterwards filling are adopted, the mining method has large one-time filling amount and low cost; the method adopts middle-deep hole drilling and blasting and carry scraper ore removal, and the device has high level and large production capacity; the method has the advantages of large production capacity of the sublevel caving method and the stage open stope method, high recovery rate of the filling method, and earth surface protection; the safety is good, and drilling, ore removal and other operations are all carried out in a sublevel drilling and ore removal approach roadway; and the ores can be removed in advance, and the ores can be removed partially after the first sublevel is ready.
Owner:NORTHEASTERN UNIV +1

Upward and downward staged rock drilling, sublevel bottom cutting and ore removal subsequent backfilling mining method

The invention provides an upward and downward staged rock drilling, sublevel bottom cutting and ore removal subsequent backfilling mining method. The method includes the following steps that panels are divided in the ore direction, a stope preparation system is arranged, upward fan-shaped medium-depth blast holes are drilled from one side to the other side of a chamber, the blast holes are filled with explosives for detonation, and an undercut space is formed after detonation; cut grooves are formed through a VCR method, and as for ore above the undercut space, downward vertical deep holes are drilled in a drilling chamber at the top of the chamber, and the holes are filled with explosives for detonation with the cut grooves as a compensation space; the chamber in each panel is subjected to two-step backstoping, after ore removal of a first-step chamber is finished, the first-step chamber is filled with cementing materials, after the first-step chamber is filled and cured, a second-step chamber is subjected to backstoping, the backstoping steps of the second-step chamber are the same as those of the first-step chamber, and the second-step chamber is filled with cemented filling bodies and non-cemented filling bodies; and the steps are repeated in this way till backstoping of all chambers are completed. The upward and downward staged rock drilling, sublevel bottom cutting and ore removal subsequent backfilling mining method has the advantages that the rock drilling efficiency of the upward fan-shaped medium-depth blast holes is improved, the waste hole rate is lowered, efficient and safe bottom ore removal is achieved, and the mechanization level is high.
Owner:MCC NORTH (DALIAN) ENG TECH CO LTD

Medium thick heavy-pitch crushed ore body frame type artificial top downward segmenting cemented filling method

The invention discloses a medium thick heavy-pitch crushed ore body frame type artificial top downward segmenting cemented filling method which comprises the following steps: dividing chamber jambs along the trend of an ore body; adopting a rail-less mining aligning system; pre-constructing a high-strength reinforced concrete artificial top in a segmented drilling lane; adopting a stoping sequence from up to down; performing drilling and blasting ore removal on the ore body through the segmented drilling lane at bottom; adopting medium-length hole drilling and remotely controlling a scraper to discharge ore; after finishing the mining of the chamber, utilizing concrete tailings to perform cemented filling; after finishing the mining of the jambs, utilizing concrete tailings or pure tailings to perform cemented filling; after completely stoping the mine chamber in the frame under the protection of the concrete artificial top, starting to stope the jamb adjacent to the segment, and meanwhile stoping the corresponding mine chamber in the frame of the next segment, and then stoping the corresponding jamb of the next segment; and after completely mining the chamber jamb in the middle segment, immediately turning towards the lower middle segment for stoping. The method provided by the invention has the advantages that the safety for mining the heavy-pitch medium thick crushed or ultra-crushed ore body is high, the resource depletion loss rate is low, the mechanical degree is high, the production capacity is high, and the like.
Owner:CENT SOUTH UNIV +1

House pillar changeable panel upward demix filling mining method

The invention discloses a house pillar changeable panel upward demix filling mining method. An ore body is divided into an ore house and an ore pillar arranged at intervals along the strike direction; a plurality of house pillars form a panel; a rock trackless preparation system is adopted and comprises a ramp, a rock slice drift, a demix ventilation connection and a rock concentrated ore removal winze; the mechanical upward demix filling mining method is adopted for mining, which mines a slice and fills the slice until the position required by the lower slice blasting compensation is reached. The backstopping order of the house pillars in the panel is the ore house first and then the ore pillar; all ore houses are subjected to upward backstopping at the same time; after a backstopping unit of the ore house is finished, the roof-contacted filling is carried out, and the mining of the ore house is temporarily stopped and the mining of the ore pillar is started; after two backstopping units of the ore pillar are finished, the roof-contacted filling is carried out, and the mining of the ore house is resumed; the abovementioned steps are repeated until the backstopping of the ore block is completed. The invention has the remarkable characteristics of improving the backstopping safety, reducing the resource dilution rate, lowering the support cost, increasing the enterprise profit, and the like.
Owner:CENT SOUTH UNIV +1

Method for extracting gas from high gas low permeability coal seam by punching, slotting, pressure releasing, and permeability increasing

The invention discloses a method for extracting gas from high gas low permeability coal seam by punching, slotting, pressure releasing and permeability increasing, comprising the following steps: whena drill is drilled into a predetermined position of the coal seam, coal bodies at both sides of a drill hole are cut in the drill hole by high pressure water jet with a certain pressure and flow; a flat slot is formed at both sides of the drill hole; the cut coal bodies is led out the hole by the high pressure water jet. The exposed area of the coal body at the slotted part in the drill hole aregreatly increased, namely that an extremely thin protective layer is exploited with local scope of the flat slot, which enlarges effective influential range of pressure releasing, permeability increasing and gas discharging of the coal bodies in the drill hole, thus the air permeability of the coal bodies is increased about 200-300 times, the average amount of single-hole gas extraction reaches 0.3m<3>/min, the concentration of the gas extraction is 30-60%, gas drainage rate of working face of coal extraction is more than 50%, the number of drill holes for gas drainage is reduced by 10-20% after slotting, pressure releasing and permeability increasing. The method realizes the safety, high efficiency and uniform extraction of the gas from the high gas low permeability outburst coal seam, and changes high gas coal seam with outburst danger into low gas coal seam without outburst danger.
Owner:CHINA UNIV OF MINING & TECH

Sublevel open-stop and delayed filling mining method

InactiveCN102562065AImprove drilling positioning accuracyNo lossUnderground miningSurface miningTailings damFilling materials
The invention relates to a sublevel open-stop and delayed filling mining method. According to the method, cutting crosscuts are wholly undercut along the width of chambers and pillars so that the space of scope rock drilling is shared with ore drawing, drilling operations of vertical parallel blast holes are achieved in undercutting space, positioning accuracy of drilling the vertical parallel blast holes is high, the intervals among the blast holes are even, and the defect of high blasting boulder yield caused by drilling sector blast holes in traditional rock drilling cross cuts is avoided; during chamber (or pillar) scoping, driving of ore drawing gateways and ore drawing admission passages in fill materials of adjacent pillars (or chambers) isn't needed, and accordingly the safety is improved; simultaneously, ores are directly drawn from the undercutting space of the chambers and the pillars, the space of ore drawing is large, mutual interference is small, ore drawing efficiency is high, and ores are drawn completely without any dead space and secondary ore loss; artificial sill pillars are constructed, ore sill plates aren't needed to be reserved, the ores are free of primary loss, and the rate of resource recycling is high. Barren rocks and ore beneficiation tailings are used for filling gobs, the barren rocks are not taken out of pits, constructions of tailing dams and barren rock yards are reduced, and land occupation is small.
Owner:UNIV OF SCI & TECH BEIJING

Intelligent full automatic combine coal mining system

The invention relates to an intelligent type full-automatic combined coal mining system, which comprises a coal mining and loading device, a conveying device, a supporting device, and an equipment train, and is mounted in the working face and crossheading in the coal mine well. The coal mining and loading device is mounted on the conveying device, the coal conveying port of the conveying device is conveyed to the outside of the well or the coal bunker through a belt type conveyor in the crossheading, the supporting device is arranged behind the conveying device for supporting the top plate of the coal seam and linking with the conveying device, the equipment train comprises a central control chamber of a central control equipment, a starter, a power device, and a lifesaving cabin, the central control equipment monitors and controls the coordination operation of the devices, the equipment train, and the power device of the equipment train, the power device provide power source for the devices and the equipment train, and the equipment train moves freely in the crossheading with the feeding of the working faces. The invention improves system complete ability and execution efficiency, and has strong function, high intelligent degree, high safety, high production efficiency, and the like.
Owner:SANY HEAVY EQUIP

House pillar type cutting and filling method of medium coal seam for controlling movement deformation of overlying rock

The invention belongs to the field of coal cutting and filling, in particular to a house pillar type cutting and filling method of the medium coal seam for controlling the movement deformation of the overlying rock, which is suitable for the coal face with the coal seam thickness more than 2 meters. The method comprises the following steps: determining the initial weighting interval L and the periodic weighting interval M of the main roof according to the main roof initial weighting interval theory; arranging the rooms and the coal pillars at intervals; and using the material with high expansibility in water during the filling according to the method comprising the following steps of mining the rooms, filling the empty rooms, mining the coal pillars and filling the empty zones of the coal pillars. The method provided by the invention can determine the most economical filling ratio through controlling the key layer to maximize the benefits; the method provided by the invention can control the movement deformation of the overlying rock absolutely within the allowed range when realizing the pulling without pillars, and realize the extremely small gentle uniform sinking of the ground; and the method provided by the invention can realize the mining of the coal resource with high recovery rate under any condition by using the material with high expansibility in water, and greatly enhance the security of coal face. When the rooms are mined, a plurality of coal face of rooms can be arranged at intervals to enhance the working efficiency.
Owner:ZIBO WANGZHUANG COAL MINE

Stepped non-pillar continuous filling mining method for deep well super high large breaking ore body panel

The invention discloses a stepped on-pillar continuous filling mining method for deep well super high large breaking ore body panel. An ore body is divided into a front part and a rear part in a super high large breaking ore body center by an transportation roadway, then the front part and the rear part are respectively divided into a plurality of panels, no pillar exists between pillars, each panel is partitioned into a primary extracting drift and a second extracting drift, the panels in the front part are extracted at first and then the panels in the rear part are extracted, the front and rear panels are extracted in a stepped manner, each production technology is carried out in the same level, and procedures can not influence each other; after the stop back production is finished, the primary extracting drift is filled with cement and the secondary extracting drift is filled by classifying tailings while roof-contacted filling is ensured; and the primary extraction drift and the secondary extraction drift adopt high strength filling topping, and binding materials are added in the filling tailings so as to improve the compression strength of a topping layer. The invention has the characteristics of high extraction safety, small loss and dilution, high mechanical degree, large stope amount, large back production strength, high production capability, short back production time and the like.
Owner:CENT SOUTH UNIV
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